Osmosis and Tonicity Worksheet


Osmosis and Tonicity

Define osmosis. _____________________________________

In which direction does water move across membranes, up or down the concentration gradient? ________________

Define these 3 terms: a. isotonic- _____________________________________ b. hypertonic _____________________________________ c. hypotonic _____________________________________

Use arrows to show the direction of water movement into or out of each cell. Color and label the cell in an isotonic environment light blue, the hypotonic environment yellow, and the hypertonic environment light green.

Match the description or picture with the osmotic condition:

A. Isotonic

B. Hypertonic

C. Hypotonic

_____ solution with a lower solute concentration

_____ solution in which the solute concentration is the same

_____ condition plant cells require

_____ condition that animal cells require

_____ red blood cell bursts (cytolysis)

_____ plant cell loses turgor pressure (Plasmolysis)

_____ solution with a higher solute concentration

_____ plant cell with good turgor pressure

_____ solution with a high water concentration

Label the tonicity for each solution (isotonic, hypotonic, or hypertonic):

____________ ____________ ____________

____________ ____________ _ ___________